Display screen with a graphical user interface



The sole FIGURE is a front view of a display screen with a graphical user interface, showing our new design.

The outermost broken lines illustrate an electronic device, which is the environment of the design and forms no part of the claim. The remaining broken lines illustrate a display screen and portions of the graphical user interface that form no part of the claimed design. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 